Optimization of audio - ultrasonic plasma system parameters

N A Haleem,M M Abdelrahman,M.S Ragheb

doi:10.1063/1.4964933

Abstract

The present plasma is a special glow plasma type generated by an audio ultrasonic discharge voltage. A definite discharge frequency using a gas at a narrow band pressure creates and stabilizes this plasma type. The plasma cell is a self-extracted ion beam; it is featured with its high output intensity and its small size. The influence of the plasma column length on the output beam due to the variation of both the audio discharge frequency and the power applied to the plasma electrodes is investigated. In consequence, the aim of the present work is to put in evidence the parameters that influence the self-extracted collected ion beam and to optimize the conditions that enhance the collected ion beam. The experimental parameters studied are the nitrogen gas, the applied frequency from 10 to 100 kHz, the plasma length that varies from 8 to 14 cm, at a gas pressure of ≈ 0.25 Torr and finally the discharge power from 50 to 500 Watt. A sheet of polyethylene of 5 micrometer covers the collector electrode in order to confirm how much ions from the beam can go through the polymer and reach the collector. To diagnose the occurring events of the beam on the collector, the polymer used is analyzed by means of the FTIR and the XRF techniques. Optimization of the plasma cell parameters succeeded to enhance and to identify the parameters that influence the output ion beam and proved that its particles attaining the collector are multi-energetic.

Highlights

IntroductionPlasmas motivate many significant technological applications in science research and in manufactures; it is an in dispensable tool for several research institutes and largest trade industries in the world,[1] and still possesses the advantage of being a large field rich in applications
Plasmas motivate many significant technological applications in science research and in manufactures; it is an in dispensable tool for several research institutes and largest trade industries in the world,[1] and still possesses the advantage of being a large field rich in applications.Due to the present plasma system design and discharge components used, the formed plasma possesses unique amazing features.[2]
This type of plasma possesses different features studied in previous works declaring a special plasma type that may promise a new acceleration technology

Summary

Introduction

Plasmas motivate many significant technological applications in science research and in manufactures; it is an in dispensable tool for several research institutes and largest trade industries in the world,[1] and still possesses the advantage of being a large field rich in applications. Due to the present plasma system design and discharge components used, the formed plasma possesses unique amazing features.[2] Its ability to deliver a large output ion beam at a low vacuum pressure has made it fruitful in developing a new technology. With a discharge current for argon and Nitrogen gasses of Idis ≈ 470 and 360 mA respectively.[3] The important goal of the present parameters optimization is to obtain comprehensive knowledge about the output beam over a wide range of discharge power and frequency conditions, to enhance its intensity and to reveal the appropriate conditions that control the particles energy of the output beam without any extraction system. Empirical knowledge can help to configure a real state of the factors that control the occurrence of the phenomenon results

Objectives

Results

Conclusion